langford



(No Model.) 7 2 Sheets-Sheet 1.

O. P. LANGFORD.

KNOB ATTACHMENT. No. 309,631" Patented Dec. 23,1884.

lill

WI massns: INVENTOR 2 Sheets$heet 2- (No Model.)

0. F. LANGFOR'D.

KNOB ATTAGHMENE No. 309,631. Patented Dec. 23, 1884.

INVENTOR WITN SSES ib/4Z lhvrriin Smarts ATFNT rricie.

CHARLES F. LANGFORD, OF BROOKLYN, NEIV YORK.

KNQB ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 309,631, dated December 23, 1884.

Application filed April 2, 1884. (No model.)

To all whom it may concern.-

Be it known that I, CHAR-LES F. LANGFORD, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Securing Knobs to Doors, of which the following is a specification.

My invention relates to an improvement in securing knobs to doors; and the object of my improvement is to provide a device adapted to the ordinary spindle-opening of a door, which is adjustable to the various thicknesses of the same, and which is further adapted to receive and retain a knob-shank independent of the spindle. I accomplish this object by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a sectional elevation of a door with my improvement attached. Fig. 2 is a perspective view of the flanged tube 0, and Fig. 3 is a perspective view of flanged tubes S and O. Fig. 4 shows a modification of tube C.

In Fig. 1, F represents a door provided with a mortise, E, for the insertion of a latch.

A represents a knob; It, the shank of knob A. A groove, P, is formed near the free end of said shank. A portion of the outer wall of said groove is removed, thereby forming lugs N N and shoulder d.

X represents a socket in end of shank It, for the insertion of a pin. T represents a tenon. D represents a spindle dotted in, and U represents a hole in the tenon or shank for the insertion of a pin.

0 represents a tube provided with a flange, and a plate, L, (which may be flush with the flange or depressed,) having a central opening and transverse slots K. Said tube is also provided with a longitudinal slot, V.

S represents a tube provided with a flange. It is also provided with a longitudinal tongue, I, and slot 6 on the periphery of said flange. Said tube may be formed with the rose-plate, in which case the flange would be omitted.

B represents a rose-plate having a central opening for the passage of shank R. (Said opening may be larger than the inside diameter of the tube S.) It is provided with a stud, H, for engaging with the slot 8 in the periphery of the flange on tube S. Tube S is connected to tube 0 by the tongue I on tube S entering the slot Vin said tube (3, and thereby the said tubes are revolved together.

I can dispense with the plate L on tube 0, and make the tube with one or more longitudinal slots, the same as slot V, in which case shank B would have the lugs N N formed upon the surface and adapted to engage with said slots V and flange. The tenon T on shank B may be formed as a part of the shank, or it may be of wrought metal and combined with it, or the shank may be formed with a mortise adapted for a spindle.

I may prefer to make tube 0 with a longitudinal tongue of sufficient length to be operated from the face of the door, either by its connection with a rose-plate or by the tongue itself. In such case tube S may be dispensed with. I may also prefer to make tube C with a longitudinal tongue and slot, and dispense 'with plate L on said tube, the slot serving for the passage of a lug on the knob-shank, and the tongue for operating said tube from the face of the door.

When the knob A is to be adjusted to a door, the tube (3 is passed into the mortise E, made for the latch, and inserted in the opening for the spindle, bringing the flange on said tube to bear against the wood surrounding the said opening. The latch is then inserted in the mortise E, and pressing against the flange of tube 0, holding it in position. Tube S is then inserted in the opening from the face of the door, causing the tongue I to enter the longitudinal slot V in tube 0, (bringing the flange on said tube to bear against the face of the door,) thereby locking said tubes so that they may be revolved together. The roseplate 13 is then placed on shank It. The said shank is then inserted in tubes S and O, the lugs N N on, said shank passing through the transverse slots K, and the tenon entering the mortise in the latch. The rose-plate is then placed in position, connecting with the flange on tube S by the stud H entering the slot 8 on said flange. The said rose-plate is then revolved, carrying with it the tubes S and 0, until the transverse slots K stand at right angles with the lugs N N on shank It, the said lugs bearing against the inner side of plate L on tube G, and thereby firmly holding the knob in position to operate the latch. The

rose-plate B is then secured to the door, and

thereby holding the tubes firmly, which prevents them from turning. The circle described by the lugs N N when the latch is operated, being less than the space between the transverse slots K 011 plate L, prevents the said lugs from coming in a line with said slots K, and thereby preventing the knob from being drawn off. The opening in the rose-plate B, being larger in diameter than the bore in tube S, prevents any strain from being imparted to the said plate when the latch is operated.

IVhen a rectangular rose-plate is used, tube S may be revolved by inserting a suitable instrument in a slit made in said plate, said i11- strument engaging with the slot 8 on the flange of said tube, and the tubes retained in position by the pressure of said plate against the flange of said tube when the said plate is secured to the door.

WVhen a rose-plate and tube S are made in one piece, it is placed in position before the shank R is inserted in the tubes.

\Vhen a spindle is used in lieu of the tenon T, it is inserted in the tubes S and C, also the latch, and the knob-shank R is then placed on the end of said spindle and passed into the tubes, as before described, the spindle playing loosely in the shank.

Then the fastener is to be used in connection with a rim-latch, a tube similar 'to 'the tube 0 is permanently secured to the face of the latch in any suitable manner, the center of said tube being in a line with the center of the mortise made in the latch for a spindle. The spindle-mortise is then removed from the latch and a knob-shank is inserted in the said tube 0 and turned so as to bring the lugs NN at right angles with the transverse slots K in plate L on said tube. The spindle-mortise is then replaced, causing the tenon T on the knob-shank to enter it, which secures the shank to the latch. A corresponding tube, (1, is then inserted in the spindle-opening in the door. The latch is then secured to the door. Tube S is then inserted in the opening on the face side of said door, the tongue I entering the slot V in tube 0. The knobshank and rose-plate are then adjusted, as above described.

\Vhen a spindle is used in lieu of a tenon on a knob-shank, the spindle is used to lock the shank to the latch, the latch being first secured to the door.

XVhen it is desired to disconnect one of the knob-shanks from the latch, as in the case of the outside knob of a vestibule-door, shank B and tube 0 are locked together by a pin passed into the socket X in said shank through one of the transverse slots K in plate L on tube the latch holding the pin in place; or, if no latch is used, a pin can be inserted in the hole U in tenon T or shank R and prevent the shank from being removed.

It will be observed that with this invention knobs can be adjusted to doors varying in thickness, the variations being provided for by the tubes sliding together, and through the means of holding the knob-shank the strain is sustained by the inner tube, which has its flange bearing against the mortisewall of the door. It will also be observed that the spindle can be dispensed with, and thereby a saving in cost of construction is attained, beside a saving of trouble and expense to the user, as the ordinary screws and washers are dispensed with.

I am aware that a tube provided with an external threaded surface has been used as a means for holding a knob-shank that is provided with a lug; but this tube depends for its support upon being screwed into a socket in the lock-plate. This method is expensive, inasmuch as the lock must be made expressly for it. This, therefore, I do not claim.

I am also aware that a knobshank which is prepared with lugs at one end is not new, as in the case of English Patent N o. 210 of 1852; but in this case the lock must be prepared expressly for such use where the support depends upon the look, as in the case cited. This, therefore, I do not claim; but

\Vhat I do claim, and desire to secure by Letters Patent, is'

1. In a knob attachment, the tube 0, provided with an external flange adapted for holding it in position in the spindle-opening, and an internal flange of suitable width having one or more transverse slots, said flange being adapted to receive and retain the knobshank It, and recess V, adapted to receive tongue I on tube S, substantially as set forth.

2. In a knob attachment, the tube 0, provided with an external flange and slot V, and tube S, provided with an external flange, and tongue I, adapted to engage with said slot V in said tube 0, and by which said tube 0 is actuated, substantially as set forth.

3. In a knob attachment, the tube 0, provided with an external flange adapted for holding it in position in the spind1e-opening, and a longitudinal slot, V, adapted for the passage of the lug on knob-shank B, and tongue I, adapted to engage with a recess or slit in the rose-plate, substantially as and for the purpose set forth.

CHARLES F. LANGFOR'D.

Witnesses:

J OSEPH TELLS, F. S. WELLS. 

